<?php

namespace Framework;

use PDO;

class Database{
    public $conn;

    /**
     * Database 类构造器
     * 
     * @param array $config
     */
    public function __construct($config)
    {
        $dsn = "mysql:host={$config['host']};port={$config['port']};
        dbname={$config['dbname']}";

        $options = [
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_OBJ
        ];

        try{
            $this->conn = new PDO($dsn, $config['username'],$config
            ['password'],$options);
        }catch (\PDOException $e) {
            throw new \Exception("数据库连接失败: {$e->getMessage()}");
        }
    }
    
    /**
     * 执行数据库请求
     * 
     * @param string $query
     * @return PDOStatement
     * @throws PDOException
     */
    public function query($query, $params = []){
        try{
            $sth = $this->conn->prepare($query);

            foreach ($params as $param => $value){
                $sth->bindValue(':' . $param, $value);
            }
            $sth->execute();
            return $sth;
        }catch (\PDOException $e){
            throw new \Exception("数据库请求执行失败：{$e->getMessage()}");
        }

    }


}
?>